[PR PATCH] traffic: optimize packet init for better performance

[github at samba.org]

There is a new pull request by catalyst-joe-guo against master on the Samba Samba Github repository

https://github.com/catalyst-joe-guo/samba optimize-packet-init
https://github.com/samba-team/samba/pull/182

traffic: optimize packet init for better performance
When we run traffic_replay, we are creating millions of Packet objects.
So small change in Packet.__init__ will make big difference.

By initializing packet with converted values without parsing string, the time
cost for 3961148 calls of Packet.__init__ dcrease from 17s to 4s, according
to cProfile.

Signed-off-by: Joe Guo <joeg at catalyst.net.nz>

A patch file from https://github.com/samba-team/samba/pull/182.patch is attached
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